Ultrabroadband Circularly Polarized Antenna Array Based on Microstrip to SIW Junction

Zerfaine, Abdelkader; Djerafi, Tarek

doi:10.1109/tap.2021.3119098

Cited by 9 publications

(2 citation statements)

References 21 publications

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“…Furthermore, some more efficient transition structures have also been proposed, such as a multilayer substrate structure [17], and a tapered structure on SIW via holes [18]. In recent years, some 3D vertical transitions have garnered significant attention [19,20]. On the other hand, due to the inefficiency of the coaxial line at millimeter-wave frequencies, the standard rectangular waveguide (RWG) is used as the measurement feed interface.…”

Section: Introductionmentioning

confidence: 99%

A Method for Low Sidelobe Substrate-Integrated Waveguide Slot Antenna Design Applied for Millimeter-Wave Radars

Wang,

Zhou,

Fang

2024

Remote Sensing

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With the development of millimeter-wave radar systems, substrate-integrated waveguide (SIW) slot antennas have been widely used. This paper presents a computational approach for calculating the equivalent normalized admittance of slot in low sidelobe SIW longitudinal slot antennas. In contrast to the existing methods, this method takes into account the impact of the N-slots coupling on the admittance. Through this method, fitting functions for resonant length and conductance are obtained, which describe the relationship between the resonant length, resonant conductance, and offset of slots. Moreover, based on the two fitting functions, a low sidelobe SIW longitudinal slot linear antenna is designed for millimeter-wave radar applications at 77 GHz. This antenna consists of a transition from the standard WR-12 waveguide to the SIW and a set of radiating slots. The simulation results indicate an impedance bandwidth of 4.8% and a gain of 13.2 dBi. The sidelobe level in the H-plane is below −28 dB, which meets the desired specifications and confirms the accuracy of the presented method.

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Section: Introductionmentioning

confidence: 99%

A Method for Low Sidelobe Substrate-Integrated Waveguide Slot Antenna Design Applied for Millimeter-Wave Radars

Wang,

Zhou,

Fang

2024

Remote Sensing

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“…The other is a dual-feed structure employing an external power divider such as 3-dB hybrid coupler. Up to now, several kinds of CP antennas in the mmWaves have been reported including printed antennas [1][2][3], planar slot and aperture arrays [4][5][6][7][8]. Achieving a wideband CP performance in the mmWaves bands requires the use of a wideband sequential-rotation feed, a power divider and some phase shifters which leads to the complexity of the design and manufacturing process.…”

Section: Introductionmentioning

confidence: 99%

Design of a dual‐CP gap waveguide fed aperture array antenna

Zarifi

Farahbakhsh

Zaman

2023

IET Microwaves Antenna & Prop

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A slot array antenna with dual‐circular polarisation (CP) is presented in this paper. To overcome the fabrication and loss challenges in mm‐wave frequencies, the gap waveguide technique is utilised. The right and left hand circular polarisation (RHCP and LHCP) radiations are achieved using slots‐fed stepped septum polariser on the longitudinal slot arrays. The waveguides and feeding layer are based on ridge gap waveguide. The experimental results demonstrate the |S11| and axial ratio of proposed antenna array are lower than −10 and 2 dB, respectively over the frequency range of 29.1–31.7 GHz. The proposed antenna exhibits the measured peak gain of 27.2 dBic at 30.2 GHz. The results prove that the proposed array antenna is a brilliant choice for 30 GHz‐band applications and could be developed to realise larger dual‐polarised planar arrays.

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A wideband fully enclosed coaxial‐to‐substrate‐integrated waveguide transition and its applications in a 1‐to‐4 radial power divider

Tao,

Liu,

Yang

et al. 2024

Micro & Optical Tech Letters

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Aimed at the interconnection between coaxial transmission line and substrate‐integrated waveguide (SIW), a wideband coaxial‐to‐SIW transition was proposed and applied in a 1‐to‐4 radial power divider. First of all, a fan‐shaped region was designed on the end of a SIW transmission line. Then, a coaxial transmission line was inserted into this region. To improve the impedance matching at the coaxial port, a feeding ring was designed on the back of the transition where the coaxial line was inserted. Next, the transition was applied in a 1‐to‐4 radial power divider to realize an equal power division. Finally, to validate the correctness of the designs, prototypes were fabricated and measured. For the coaxial‐to‐SIW transition, measured reflection coefficient |S11| was less than −15 dB from 7.84 to 12.18 GHz. Transmission coefficient |S21| was between −0.52 and −0.24 dB. For the 1‐to‐4 radial divider, measured |S11| was less than −15 dB from 7.91 to 12.4 GHz, and the transmission coefficient was around −6.9 dB. Measurement and simulation agreed well with each other. Therefore, the proposed design can be used in coaxial‐to‐SIW interconnection scenarios.

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Ultrabroadband Circularly Polarized Antenna Array Based on Microstrip to SIW Junction

Cited by 9 publications

References 21 publications

A Method for Low Sidelobe Substrate-Integrated Waveguide Slot Antenna Design Applied for Millimeter-Wave Radars

A Method for Low Sidelobe Substrate-Integrated Waveguide Slot Antenna Design Applied for Millimeter-Wave Radars

Design of a dual‐CP gap waveguide fed aperture array antenna

A wideband fully enclosed coaxial‐to‐substrate‐integrated waveguide transition and its applications in a 1‐to‐4 radial power divider

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